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(I Io Model.) 3 Sheets-Sheet 1, F. S. SLATTBRY. MACHINE FOR SIFTING PULVERIZED CLAY. No. 543.221.

Patented July 23, 1895.

INVENTOB WITNESSES:

(No Model.)

3 SheetsSl1eet 2.

'P. S. SLATTERY. MACHINE FOR SIFTING PULVEHIZED CLAY.

INVE N 70/? J W ly/14 I J4 (1,, mm

WITNESSES:

3 sheets -she-et; 3

('No Model.) v F. s. SLATTERY.-

MACHINE FOR SITTING BULVERIZED CLAY. No 543,221, Patented July 23, 1895.

Fig 8 W/TNES s.- INVENTOH 1 6 A 770/?NEY.

UNITED ST TES PATENT OFFICE.

FRANK S. SLATTERY, OF-BRADFORD, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO LEMUEL W. YOUNG, OF SAME PLACE.

lVlACl-HNEFOR SIFTING PULVERlZED CLAY.

spmmmmmmasa ae or Letters Fatent rrqf543,221,datea.m1 23, 1895.

Application filed January 21,1895. lser ial No. 535,745. (No model.)

To 12% whom it may amr Be it known that I, FRANK'S. SLATTERY, a

citizen of the United States, re'sidingat Brad-. ford, in the county of McKean and State of Pennsylvania, have invented a new and use* ful Improvement in Machines for Sitting Pulverized Clay, of which the following is a specipreparatory to pressing it into bricks under the dry-press process.

The object of my invention is to provide a screen that will be economical in its construetion, easily and cheaply repaired; one that will not clog up when in use and that will thoroughly separate the tailings from the finer portion of the pulverized clay, and with which the size of the screened particles can chine.

ism illustrated in the accompanying drawbe varied at the will of the operator of the ma- I attain this object by the mechanings, in which- Figure 1 represents a top view of my ma chine. Fig. 2 represents a side elevation.

Fig. 3 represents a side elevation of the screen,

the feeding-chute,the driving niechanism;an d

the outside shell, which is shown in cross-section. Fig.4 represents a cross sectional view, of the screen and its connections, as shown in Flg. 3. Fig. 5 represents a side elevation of the funnel which is secured to the shaft and supports the screen. Fig. 6 represents a bottom view of Fig. 5. Fig. 7 represents aside the outside ribs of the funnel.

elevation of the funnel and shows apair' of screen-bars, one of which is bolted to one of I The other is shorter and rests on top of the rib and is bolted to the longer bar. It also shows the adjoin-' ing edges of two sections of screen held securely between them. Fig. 8 represents one of the sections of screen.

6 isa journahboigwhich supports the screen- 'shaft l and'in'whi'ch the shaft 1 revolves.

7Iis abevel gear-wheel in which meshesthe pinion- 8 on the drive-shaft 9.

j 10 is a funnel provided with the cross-bar 1 1 and collar 12, which latter is secured to the shaft-1 with a set-screw or its equivalent.

It is also provided with the ribs 13 and the annular flange 14, which fits into the elbow 15 'of the tailings-chute 16. l j Theelbow 15 is provided with a stutfingbolt 17 through which the sh aft 1 passes. The

objectof the stuffing-box 17 is to prevent a leakage of the tailingsthrough the shaft-orifice of'the elbow 15.

f To the ribs 13 of the funnel 10 are bolted the bars 18 and to the bars 18 are secured the bars 19, which rest on top of the ribs 13. Between these bars are placed the side edges of the screen-sections 20. In the drawings the screen is represented as consisting of eight sections, which Iconsider the most practical number-for the purpose intended. The object of having the screens made sectional is to be able to more readily repair them when worn and at a small cost, as a section can be replaced with but little labor and at one-eighth the expensethat would be incurred if the screen was made of one entire piece.

; '21 is the feeding-spout, provided with the slide 22,for the purpose of regulating the supply of the pulverized clay to the machine. 23 is a funnel-shaped casing surrounding the screen for the purpose of receivingthe screenings and guiding them into the delivery-chute 25 is a rim consisting of 'a series of wooden cants of one or more courses supported by the standards 26, which are preferably of the finer the screenings are the finer and smoother the face of the bricks will be and the higher will be their merchant-able grade, and the coarser the screenings are the coarser and rougher will be the face of the bricks and the lower will be their grade. As the market demands high,low, andintermediate grades of brick, I have constructed my machine so that the size of the particles screened may be varied according to the desire of the operator of the machine. Thus by revolving the screen slowly the pulverized clay sifts through the screen by gravity, the finest portion passing through the meshes, the coarser portion falling in almost a perpendicular line with the feedingchute 21 into the funnel and thence into thetailings-chute16. Byincreasingthespeed of the machine so that a slight centrifugal power is exerted on the pulverized clay the siftings will be somewhat coarser. As the screen increases in speed the greater will be the centrifugal power and the coarser the 'siftings until the particles are as large as the meshes are capable of passing, thereby making a screen with one size of mesh serve for sifting several sizes of screenings.

The circumference of the top of my screen is about twenty-seven feet, and the pulverized clay discharged from the feeding-chute either passes through the screen ordown through the tailings-chute before a revolution is made, leaving the portion of the screen presented to the mouth of the feeding-chute always clean and free from pulverized clay.

My machine can be used in an inverted form with the ribs and bars placed on theinside of the funnel and screen, the screen slowly revolved and the sifting done by gravity, the failings being received in a trough at the base of the machine, but from actual tests made I prefer the screen set as shown.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine for sifting pulverized clay, the combination with the vertical screen shaft and the foot box adapted to bear on antifriction balls, of the funnel formed with the cross bars, collar, outside ribs and annular flange, the screen bars 18, fixedly secured to the ribs, and the screen bars 19, bearing on the top of the ribs, and means for securing them to the screen bars 18 substantially as shown and described.

2. In a machine for sifting pulverized clay the combination with the vertical screen shaft and the foot-box adapted to bear on antifriction balls, of the funnel formed with the crossbars, collar outside ribs, and annular flange, the screen bars 18, fixedlysecnred to the ribs, and the screen-bars 19, hearing on the top of the ribs, the said screen bars being adapted to receive between them the adjoining edges of the sections of screen, and meanswhereby the sections of screen can be held securely therein, or readily removed for the purpose of repairing substantially as shown and described.

In a machine for sifting pulverized clay, the combination with the vertical screen shaft, and the foot box adapted to bear on antifriction balls of the funnel having integral therewith the cross-bars, collar, outside ribs and annular flange, the screen bars 18', fixedly secured to the ribs, and the auxiliary screen bars 19, said screen bars being provided with both holes in alignment for the purpose of securing together the edges of the adjoining tapering sections of screen by means of bolts, substantially asshown and described,

4. In a machine for sifting pulverized clay, the combination with the vertical screen shaft and the foot box, of the funnel having integral therewith, the cross-bars, collar, outside ribs and annular flange, and the casting formed with a cylindrical projection on its lower side, said projection being provided with a packing nut, and said casting being adapted to engage at its upper end with the annular flange and at its lower end with the failings chute substantially as shown and described.

5. A machine for sifting pulverized clay, comprising a vertical screen shaft provided with a foot-box adapted to bear on antifriction balls, a funnel having integral therewith inside cross-bars--a collar adapted to be se cured to the vertical screen shaft and an annular flange adapted to fit on the inside of the tailings chute casting, said casting being formed with a curved passageway and a cylindrical projection provided with a packing nut and connected with the tailings chute, each of the outside ribs provided with a pair of screenbars of unequal length, the longer bar being bolted to the ribs, the shorter bar being adapted to rest on top of the rib and to be bolted to the longer bar, several tapering sections of screen the adjoining sides of which are adapted to be placed between the pairs of screen bars and held firmly therein by means of bolts, the outside funnel shaped casing connected at its lower orifice to the delivery chute and formed with a flange at its upper orifice, and the supporting frame consisting of a rim composed of several courses of wooden cants supported by standards, preferably of pipe, substantially as shown and described.

FRANK S. SLAT'PERY. Witnesses:

W. N. TRYON, J OHN A. SEYMOUR. 

